Hello, thank you for your reply!
I’ve asked my client for feedback, he says that it does get saved before, and has no effect.
In the most common cases, the streetname and housenumber gets stuck to each other, when they try to edit it to give a space where needed, the plugin refuses to detect this.
It also seems to refuse when the client forgot to add a housenumber, and they try to add the housenumber to it